LS138 UV Energy Meter – Simultaneous UVA/UVB/UVC/UVV Measurement
LS138 UV Energy Meter – Simultaneous UVA/UVB/UVC/UVV Measurement
LS138 UV Energy Meter
The LS138 UV Energy Meter is a high-precision, intelligent measuring instrument designed for simultaneous measurement of UVA, UVB, UVC, and UVV energy and intensity. It provides real-time monitoring of temperature and UV power, enabling users to accurately track the performance of UV curing systems, dryers, coating machines, exposure units, and printing equipment.
With an ultra-fast sampling rate of 2048 times per second, the LS138 ensures highly accurate and repeatable results. The device is suitable for evaluating UV energy, intensity, and temperature of light sources such as mercury, halogen, gallium, iron, and xenon lamps.
This UV energy meter supports simultaneous measurement across four UV bands (UVA/UVB/UVC/UVV) and records both irradiation energy and exposure duration. The integrated PC software allows users to easily export test data, generate analytical reports, and print detailed results for process documentation.
Features
Simultaneous UVA, UVB, UVC, and UVV Measurement
The LS138 automatically identifies and measures UV power and energy across the four UV bands. This feature enables users to monitor surface curing (UVC) and penetration curing (UVA/UVV) wavelengths, optimizing curing efficiency, improving production quality, and increasing throughput.


Large LCD Display with Real-Time Monitoring
The instrument features a large, easy-to-read LCD screen that displays temperature, UV power, and real-time test curves with maximum and minimum values clearly indicated.



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Ultra-High-Speed Data Acquisition With a sampling rate of 2048 samples per second, the LS138 provides high-resolution and high-accuracy measurements, capable of capturing rapid changes in UV intensity and energy during the curing process. |
High-Temperature-Resistant Design
Engineered for demanding environments, the LS138 uses a high-precision, fast-response temperature sensor that dynamically measures the actual temperature inside UV curing equipment, ensuring stable operation even under elevated thermal conditions.

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High-precision temperature sensor |
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Built-In Timer Function The internal timer precisely records the duration of each UV exposure, ensuring that curing processes are performed according to the specified settings. This facilitates consistent process control and reliable quality verification. |
Comprehensive PC Software (USB Type-C Connection)
The LS138 includes PC software that allows users to view detailed recorded data, generate energy and intensity curves, and export or print comprehensive test reports. The USB Type-C interface ensures a fast and stable data connection.

Dual Measurement Modes
Supports automatic and manual measurement modes, offering flexibility for a wide range of industrial and laboratory applications.
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Auto Measurement Mode The auto measurement mode accurately records curing time and displays the corresponding light intensity curve. |
Manual Measurement Mode When multiple light sources are used, the overall distribution of the UV light source can be analyzed through the power curve. |
| Adjustable Settings for Advanced Control Users can freely adjust measurement bands, units, data smoothing levels, and other configuration options to meet different operational requirements and testing environments. |
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Specifications
| Parameter | Value |
|---|---|
| Spectral Range | UVC: 230–280 nm (λp=254 nm); UVB: 280–315 nm (λp=310 nm); UVA: 315–400 nm (λp=365 nm); UVV: 395–445 nm (λp=420 nm) |
| Power Measuring Range | 0–2000 mW/cm² |
| Power Resolution | 0.01 mW/cm² |
| Energy Measuring Range | 0–999,999 mJ/cm² |
| Measuring Accuracy (H = standard value) | H < 5 mW/cm²: ±0.5 mW/cm²; H ≥ 5 mW/cm²: ±10%H, ±5% (typical) |
| Temperature Measuring Range | –55°C to +125°C |
| Sampling Speed | 2048 samples/second |
| Power Data Storage Interval | 32 samples/second |
| Temperature Data Storage Interval | 2 samples/second |
| Recording Period | 32 minutes |
| Power Supply | 2 × AAA alkaline batteries |
| Display | Dot-matrix LCD |
| Dimensions | Ø120 mm × 13 mm |
| Weight | 225 g |
Packing includes:
1x UV Energy Meter
1x USB Cable
1x Anti-static Gloves
1x Small Screwdriver
1x User Manual (En)
1x Calibration Report
1x Certificate/Warranty Card
1x Plastic Case












